public NetSize getRelatedNetSize()
{
if (!isValid(new List<string>() { "prName", "pID" }))
return null;
string sqlCommand = String.Format(@"select nsID from NetSize where prID={0}", prID);
Sql sql = new Sql();
SqlDataReader reader = sql.selectNetSizeIDByPrID(sqlCommand);
if (!reader.HasRows)
return null;
reader.Read();
NetSize netSize = new NetSize();
netSize.id = Int32.Parse(reader[0].ToString());
netSize.select();
return netSize;
}